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57 строки
1.2 KiB
57 строки
1.2 KiB
/****************************
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* High-level timing wrappers
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****************************/
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#include <stdio.h>
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#include "fsecs.h"
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#include "fcyc.h"
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#include "clock.h"
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#include "ftimer.h"
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#include "config.h"
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static double Mhz; /* estimated CPU clock frequency */
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extern int verbose; /* -v option in mdriver.c */
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/*
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* init_fsecs - initialize the timing package
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*/
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void init_fsecs(void)
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{
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Mhz = 0; /* keep gcc -Wall happy */
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#if USE_FCYC
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if (verbose)
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printf("Measuring performance with a cycle counter.\n");
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/* set key parameters for the fcyc package */
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set_fcyc_maxsamples(20);
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set_fcyc_clear_cache(1);
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set_fcyc_compensate(1);
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set_fcyc_epsilon(0.01);
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set_fcyc_k(3);
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Mhz = mhz(verbose > 0);
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#elif USE_ITIMER
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if (verbose)
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printf("Measuring performance with the interval timer.\n");
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#elif USE_GETTOD
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if (verbose)
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printf("Measuring performance with gettimeofday().\n");
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#endif
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}
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/*
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* fsecs - Return the running time of a function f (in seconds)
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*/
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double fsecs(fsecs_test_funct f, void *argp)
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{
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#if USE_FCYC
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double cycles = fcyc(f, argp);
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return cycles/(Mhz*1e6);
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#elif USE_ITIMER
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return ftimer_itimer(f, argp, 10);
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#elif USE_GETTOD
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return ftimer_gettod(f, argp, 10);
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#endif
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}
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